Checker-brick for hot-blast stoves.



D. D. LAMOND.

GHEGKEE BRICK FOR HOT BLAST MOVES,

APPLICATION FILED JUNE 17, 1909 Patented all". 1,1910.

UNITE s ArnS PaTEnT orruo n DAVID 1;. narrow), or rrrrsnnne; rnnivsvnvama 7 ing to produce brick of such form as to provide an efiicient bond, the brick being of such form as to break joint in the successive courses. The integrity of the flue structure is thus maintained notwithstanding the wide and sudden variations in temperature to which the flues of hot-blast stoves are subjected.

The invention is preferably embodied in two shapes of bricks, one shape having a passage formed therethrough, preferably midway its ends, to receive the reduced or projecting extremitiesof bricks of the other shape, such projecting extremities fully entering the passage of the first mentioned shape so that the sides of eachpassageformed brick are squarely engaged by the end surfaces of the other shape.

, In the accompanying drawings, Figure 1 is a view in perspective of some of the brick laid up, as when constructing a stove. Figs.

- 2 and 3 are details of two different shapes employed. Figs, 4 and 5 are details of shapes of modified form.

The invention is preferably embodied in "the two shapes A and B, shown in Figs. 2

and 3. Shape A is of rectangular outline, and formed therethrough from one side face 2 to the opposite side face is passageway 3,

which is here shown located midway the end surfaces 4, and is open through one of the longitudinal edge faces, in the'present illustration the bottom face. Shape B is also of rectangular outline, and on its end faces 5 are the extensions or projections 6 which, in the adaptation shown inFigs. 1 and 3, are coincident with and form continuations of the bottom edge 7 of the brick. The length of each of projections 6 is half the length of passage-way 3, so that with two of shapes B in line with \their projections 6 abutting, one of the shapes A fits therebetween, embracing projections 6 with its side faces 2 engaged by the faces 5 of shape B. The corners of the Specification of Letters 1 mm.

Application filed June 17 1909. Serial No. 502,706.

E CHEGKEB-IBRICK FOR HOT-BLAST STOVE-S.

' eas M r,- 1, i910.

passageway and the end projections are preferably rounded, as shown.

When the brick'are laid up to form' the flue checker work, as in Fig. 1, it will be seen that in each horizontal course there are parallel rows of shape A, and extending at right angles to thcserows are parallel rows of shapes B. It is further characteristic of the invention that the rows of shapes A. in one course are at right angles to the like rows of sha es in the courses immediately above and be ow. A result of this is that in the successive rows each shape A is centered with though at right angles to the like shapes immediately above it and below it.

The shapes interlock in such manner that no two seams or joints are in line in adjacent courses and a thoroughly efiicient and durable bond results. 7

In the modification of Figs. 4 and 5, the shapes C and D are of square outline, and shape C is formed with the angular central passageway .8 in which enter projections 9 exten ing centrally from the end faces 10 of shape D. In fact, shape C is simply shape A doubled, thereby locating the passageway jat the center instead of at one of the edges. Likewise shape D merely involves a doubling of shape B.

While the invention is here shown and ,described in connection with the construction of checker work for hot-blast stoves, it may be employed wherever such construction may be advantageously used.

I claim 1. Checker work for stoves, etc., consisting of brick having end extensions, in combination with other brick disposed at right angles thereto and having openings formed therethrough between their ends into which the extremities of the first mentioned bricks are entered.

2. Checker work for stoves, etc., consisting of brick having end extensions, in combination with other brick disposed at right angles thereto and having passages formed therethrough midway their opposite ends into which the extremities of the first mentioned brick are entered.

3. Checker work for stoves, etc., consisting of brick having end extensionsfin combination with passage formed brick disposed at right angles thereto and the transverse thickness of which is double the length of the end extensions of the first mentioned bricks, said passages located interthediate the brick ends, whereby two bricks with ex.-

tended ends may abut against opposite faces passage-formed brick with their end;

of a extensions entered in the passagethereof.

v. 4. Checker work for stoves, etc., consist ing of courses of brick laid one course upon the other, each course'formed of bricks hav ing end extensions and of other bricks hav-.

ing passages formed therethrough to receive said end extensions, the bricks of each form laid in parallel rows which extend at right angles to eachother in the same course, the rows formed of like bricks being at right angles to eachother in the adjacent courses.

'5. Checker work-for stoves, etc.,- consis t inglo'fcourses'ofbrickslaid one course upon, anot'her, "eachcoursemade up of bricks hav-j --i ngend"extensions and other bricks having- .pa'ssages formed therethrough to receive the extension, the length of each passage-formed brick corresponding to the length of the other brick including the extensions ofthe latter,'the bricks of each form arranged in parallel rows in-each course with the rows of each form extending in right angles to each other, the passage-formed bricks of each course disposed centrally of but at right anshape havin end extensions'coincidentwith onelongitu lnal edge thereof with-the end extensions entered 1n the passages of the other shape.

7. Chec er work for stoves, etc., consisting of bricks of two shapes laid in the same course at right angles "to each other, one shape having a passage formed therethrough tical face and open through a horizontal face, and the other shape having end 'exten-' sions coincident with one longitudinal edge from one vertical face to the opposite ver thereof with ad'acent bricks of the last mentioned shape a apted to abut against faces of the passage-formed brick with their end extensions entered in the passage thereof.

-. 8.' Checker work for stoves, etc., consist- "angles to each other, the bricks of one form having passages extending therethr'ough fromone vertical face to the other, the passage rounded to avoid angular corners, and

rounded to enter and fit within said passages.

9. A -brick for checker work of rectanlar outline and having a passage extend- 1n therethrou h between its ends from one si e face to t e other, the 1passage being gperliI through a longitudina edge of' the me a In testimon whereof I afix my signature 1n presence 0 two witnesses.

' DAVID D. LAMOND.

Witnesses ALEX. S. MABON,

J. N. NESBIT.

ingho f bricks of two forms arranged at right the other form having end extensions 

